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A recently reported synthesis of the transuranium element bohrium (Bh) involved the bombardment of berkelium-249 with neon-22 to produce bohrium-267. Write a nuclear reaction for this synthesis. The half-life of bohrium-267 is 15.0 seconds. If 199 atoms of bohrium-267 could be synthesized, how much time would elapse before only 11 atoms of bohrium-267 remain? What is the expected electron configuration of elemental bohrium?
Using the concept of a mass balance describe how environmental engineers and scientists model the carbon cycle in the earth's atmosphere allowing them to predict build up of CO2 over time.
Estimate the annual operating cost of providing refrigeration to a condenser with duty 1.2 MW operating at -5 ºC. The refrigeration cycle rejects heat to cooling water that is available at 40 ºC, and has an efficiency of 80% of the Carnot cycle ef..
Neglecting stator resistance, leakage reactance, and all losses, if the stator-to-rotor turns ratio is 2:1 and the applied voltage is 100 V, find the rotor-induced emf at standstill and at 0.05 slip.
The effluent liquid is analyzed and is found to contain 1.5 moles (NH4)2SO3 per mole of NH4HSO3. The heat of formation of (NH4)2SO3 (aq) at 25°C is -890.0 kJ/mol, and that of NH4HSO3 (aq) is -760 kJ/mol. The heat capacities of all liquid solutions..
The total brush-contact drop is 2 V, and the core and rotational losses are 380 W. Assume that stray load loss is 1% of output. Compute the efficiency of the motor.
Draw the graph carefully. Please use one graph per country and show both the autarkyand the free trade equilibrium on each graph.
what is the maximum profit obtainable per pound of chemical Z ?
A boiler is fired using 200 kg /hr of pure saturated hydrocarbon gas ( Cn Hm ) at atmospheric pressure and 20 oc. The dry analysis of the flue gas which leaves the boiler at atmospheric pressure and 300 oc is CO2 =..
Solid NH4NO3 (ammonium nitrate) decomposes on heating to 400°C, forming N2O gas and water vapor, H2O. (a)Write a balanced chemical equation
With the number of poles decided, find the speed in r/min at which the motor-generator set will operate.
A 50-kW, 230-V compound generator has the following data: armature-circuit resistance 0.05 Ω, series-field circuit resistance 0.05 Ω, and shunt- field circuit resistance 125Ω.
Draw and completely label a flowsheet of the process (use 100 kg/min of ore as a basis). Calculate the rate of Fe2O3 production (kg/min) in the outlet stream, and the total molar flow and composition of the outlet gas stream.
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